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Poster: Heckle Date: Oct 3, 2012 6:46am
Forum: etree Subject: Re: Streaming/ bandwidth question

Thanks for the replies. Next question: Does streaming a show use much bandwidth - I like to listen to music at work and the IT dept sometimes monitors bandwidth usage and more importantly I want to be mindful of my co-workers because we all access a database on a remote server and use it all day.

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Poster: Administrator, Curator, or StaffMonte B Cowboy Date: Oct 3, 2012 7:39am
Forum: etree Subject: Re: Streaming/ bandwidth question

I do not know which "VBR setting" The Archive's file deriver is using. There are 10 settings available for VBR encoding: 0 is highest quality (least lossy, most b/w); 9 is the lowest quality (most lossy, least b/w). Trader's Little Helper s/w allows users to control their own VBR settings. In theory, you could encode your own VBRs in TLH, set the rates yourself for "optimum", and then upload them to the LMA if your are the Admin for that show. Then you would need to Zip them up manually, and do the other derivatives manually. Trust me, I'm sure no one is doing this. The Archive's file deriver is an excellent feature.

VBR is the abbreviation for Variable Bit Rate. This means the MP3 audio files are using an algorithm with a variable bit rate encoding scheme. Therefore, the bandwidth used during playback will vary accordingly. There is NO constant rate in VBR.

The "LAME" VBR algorithm is here:
http://lame.sourceforge.net/vbr.php

Typically, streaming VBRs may exceed 320 kbits per second during "high resolution" bursts. This may happen many times per minute, or dozens of times per song. On the low end, I'm guessing it's about 160 kbits per second. VBR rates are constantly varying. On average, Grateful Dead music VBR files will stream about 192 kbits per second, give or take.

Another way to go in your case is to d/l VBR Zip files from the LMA at your home. Unzip them on your computer. Load them into your iTunes by creating a Playlist for each show. Then load them onto your old iPod or iPhone. Bring that device to work, and play your VBR MP3 files from the iPod device... Zero Bandwidth used at work.

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Poster: Administrator, Curator, or Stafftracey pooh Date: Oct 3, 2012 2:42pm
Forum: etree Subject: Re: Streaming/ bandwidth question

thankfully, we're very open about our processing, here!

so i found the most recently uploaded LMA/etree show and found it's derive task log.

here's the relevant snip

[ PDT: 2012-10-03 13:57:35 ] Executing: /petabox/sw/bin/timeout -s 9 14400 /usr/local/petabox/sw/bin/ffmpeg -v 0 -y -vn -i '/var/tmp/autoclean/derive/bloodkin2012-08-18.flac16_sbd_mk22/bloodkin2012-08-18s2t01.flac' -ac 2 -ar 44100 -f wav - 2>/dev/null |/usr/bin/lame --quiet --disptime 10 --preset standard --ta 'Bloodkin' --tt 'Success Yourself' --tn '12' --tl '2012-08-18 - Haley'\''s 40th Bday Celebration' --add-id3v2 --tc http://archive.org/details/bloodkin2012-08-18.flac16_sbd_mk22 --tv LINK=http://archive.org/details/bloodkin2012-08-18.flac16_sbd_mk22 --ti '/var/tmp/autoclean/derive-bloodkin2012-08-18.flac16_sbd_mk22-MP3/art.jpg' - /var/tmp/autoclean/derive-bloodkin2012-08-18.flac16_sbd_mk22-MP3/tmp.mp3 > /dev/null 2>&1


so we use "lame ... --preset standard ..."

hope that helps!

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Poster: trevtdogg Date: Nov 12, 2012 2:38am
Forum: etree Subject: Re: Streaming/ bandwidth question

"so we use lame ... --preset standard ..."

which to fast forward a few years in lame development is the same as a V2 quality VBR mp3 ;)

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